Half to john faeeell



y {No Model.) 4Sheets-Sheet 1T R. G. NUGBNT. Machine fdr-Bending MetalArticles/ Patented May 31,1881.

} Ina/wafer.-

\mmx mwwnc (No Model.)

R O N 4Sheets Sheet2.

Machine for Bending Metal Articles;

No.. 242,359. Patented May 31,1881.

u. PETER5, mmm m. waning/bl; 11c.

'(No Model.) 4Sheets-Sheet 3.

. R. O. NUGENT. Machine for Bending Metal Artiolesn No 242,359. PatentedMay 31,1881.

(No Model.) I 4 Sheath-Sheet 4.

, R. G. NUGBNT.

Machin efo'r Bending Metal Articles. No. 242,359. Patented May 31,1881.

zaawi- 5 aw, ZM

Unrrnn STATE PATENT OFFICE.

RICHARD O. NUGENT, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOJOHN FARRELL, OF SAME PLACE.

MACHINE FOR BENDING METAL ARTICLES.

SPECIFICATION forming part of Letters Patent No. 242,359, dated May 31,1881.

Application filed February 12, 1881. (No model.)

To all whom it may concern Be it known that I, RICHARD G. N UGENT, ofPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Improvement in Machines for BendingSheet-Metal Articles; and I do hereby declare that the following is afull and exact description thereof, reference being bad to theaccom'panyin g drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in machinesfor bendingsheet-metal articles; and it consists in a series of couiform rollsjournaled in arms attached to segments furnished with r 5 gear-teethadapted to mesh with the screwthreads of worm wheels, (commonly calledendless screwj) said segments adapted to move in the arc of a circle andin adjustable guides arranged on arevolvingtable, the whole so arrangedand operating that a circular disk of sheet metal placed between pairsof said rolls will be gradually bent to the form desired, as willhereinafter more fully appear.

To enable others skilled in the art with which 2 5 my invention is mostnearly connected to make and use it, I will proceed to describe itsconstruction and operation. 7

In the accompanying drawings, which form part of my specification,Figure 1 is a top View or plan of my improvement in machine for bendingsheet-metal articles. Fig. 2 is a side elevation of the same. Figs. 3,4, 5, 6, and 7 are detailed sections of the several parts of saidmachine. Fig. 8 represents a circular 3 5 disk of sheet metal and avertical section of a vessel formed therefrom by said machine.

In the accompanying drawings similar letters of reference refer to sameparts in the several figures of said drawings.

0 Arepresents the frame of the machine, which frame consists of acircular base, B, and arch O, the former furnished with gear-teeth,which mesh with the teeth of bevel-wheels D, the axes a of which arejournalcd in hangers b, so

cured to the under side of a revolving table, E, which is journaled upona hollow stand, F, projectingnpward from the center of the circular baseB, with the periphery of said revolving table fitted to recesses in thearch 0,

as indicated atc.

0n the under side of the revolving table E are gear-teeth d, which meshwith the teeth of the driving-wheel G, the axes e of which are journaledin the arch O.

()n the upper side of the revolving table E are adjustable guides H forthe segments I, to which the coniform rolls J and K arejournaled. Theadjustable guides H move in slotsfin the revolvingztable E, and aresecured in the position desired by means of bolts g, as shown in Fig. 4.

To the upper side of the revolving table are also secured uprights L, inthe upper end, h, of which are screws M, which are connected to theguides H for adjusting them with relation to the axis of the revolvingtable E.

To the segments I are hinged, at 'i, arms N, in which the coniform rollsK are journaled. These arms are held in a fixed position with relationto the segments I by means of keysj. The rolls J are also journaled inarms 0, which are secured to the segments 1, as shown in Figs. 1, 5, and6. The rolls Jand K are made tapering, so that throughout their entireaction will be uniform on the disk of metal they are caused to act upon.Therefore the taper of said rolls must be in proportion to the distanceof travel of the different parts of said rolls. The skillful mechanicwill readily understand this when it is stated he must ascer- 8o tainthe difi'erence of travel between the greatest and smallest diameter ofsaid rolls and make the angle of taper accordingly.

In arch (J, at It, is an adjustable holding de vice, P, the axis ofwhich is concentric with the axis of the revolving table E. The lowerend,

1, of the holding device P must be made in form corresponding to thatportion of the article which is directly under it. For example, in Fig.1 the dotted lines m represeutaformed o kettle, such as is shown invertical section in "Fig. 8. Therefore the lower end, I, of the holdingdevice P is made to conform to the contour of the bottom of said kettle,which is shown in vertical section in Fig. 8. The part is of the 9 5arch O is furnished with screw-threads corresponding to thescrew-threads on the holding device P, the former serving as a screw-nutfor the latter.

In the hollow stand F is placed a screw, Q,

on the upper end of which is a disk, n. This screw Q is furnished with ascrew-nut, i", having arms 8 for operating it. The screw-nut 1" isrotated on the upper end of the hollow stand F, and is used for thepurpose of elevating the screw Q and causing it to press the sheet metalfrom/which the article is formed against the part I of the holdingdevice 1?.

The axes a of'the wheels D are furnished with worm-wheels or endlessscrews It, the threads of which mesh into the gear-teeth ton thesegments 1. The bearings of the axes a should be so constructed andarranged that the bevel-wheels D can be thrown into and out of gear withgear-teeth a on the upper surface of the base B.-

The skillful mechanic will, from the foregoing description and byreference to the accompanying drawings, readily understand theconstruction and arrangement of the several parts of the machinehereinbefore described and the relation that said parts bear to eachother. I will therefore proceed to describe the operation of saidmachine, which is as follows: The operatorcuts a circular disk, such asshown in Fig. 8, from a sheet of copper, (if he desires to make a copperkettle,) and places said disk concentric on the disk n, and between theconiform rolls J and K, the axes of which are at this time on ahorizontal plane. The operator then, by means of a screw-nut, r,elevates the screw F, and its disk a will force the disk of sheet-copperup against the end I of the holding device P. The wheels Gr, beingrevolved by power applied to their shafts y, will revolve the table E,which carrying around with it the hanger b and axes Ct of the wheelsD,the gearteeth of which mesh with the gear-teeth a on the upper face ofthe base 13, the wheels D will be revolved, thereby revolving the axes aand worm-wheels R, which, meshing with the gear-teeth t of the segmentsI, will cause them to travel up in their guides. H, carrying upward theouter ends of the coniform rolls J and K, which, during their upwardmovement, will be revolved by their frictional action on the copperplate placed between them. The coniform rolls J and K, by traveling overthe surface of the copper plate, (which is held stationary,) while beinggradually moved up into the position shown in Fig. 1, prevent allwarping or wrinkling of the plate in the operation of bending it to theform desired. When the plates, two or more pairs of coniform rolls,

means for revolving them on their axes and around the axis of the platebetween them, and means for elevating their outer ends from a horizontalplane toward a vertical plane,

substantially as herein described, and for the purpose set forth.

2. In a machine for bending sheet-metal plates, one or more pairs ofconiform rolls and their bearings, a revolving table having guides inwhich the bearings of said rolls move, and means for operating saidparts, substantially as herein described, and for the purpose set forth.

3. In a machine for bending sheet-metal plates, one or more pairs ofconiform rolls and their bearings, a revolving table having adjustableguides in which the bearings of said rolls move, and means for operatingsaid parts, substantially as herein described, and for the purpose setforth.

4.. The combination of the coniform rolls J and K, segments I,adjustable guides H, revolving table E, holding device 1?, screw F, andoperating mechanism, substantially. as herein described, and for thepurpose set forth.

5. The base B, having gear-teeth u, revolvin g table E, havinggear-teeth 01, wheels G D, worm'wh eel R, and their shafts, incombination with the segment I, adjustable guides H, coniform rolls J K,holding device P, and screw F, constructed, arranged, and operatingsubstantially as herein described, and for the purpose set forth.

6. The coniform roll K, journaled in arm N, hinged to the segment I, incombination with the coniform roll J,journaled in arm 0, at-

tached to said segment, substantially as herein too described, and forthe purpose set forth.

R. U. NUGENT.

Witnesses A. G. JOHNSTON, .I. J. JOHNSTON.

